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INVESTIGATION OF Escherichia coli FROM EAR SWABS OF UNIVERSITY STUDENTS FOR IN VITRO BIOFILM PRODUCTION

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Table of contents

CHAPTER ONE                                                                                        1

1.1      Introduction                                                                                     1        

1.2      Aim of the Study                                                                              3

1.3      Objective of the Study                                                                      3

1.4      Literature Review                                                                            4

CHAPTER TWO: MATERIALS AND METHODS                                    10

2.1      Sample Collection                                                                            10

2.2      Material and Apparatus Used                                                            10

2.3      Sterilization of Glasswares                                                               10

2.4      Media Used                                                                                     11

2.5      Media Preparation                                                                           11

2.6      Determination of Microbial Load                                                      11

2.7      Isolation of Escherichia coli                                                             12

2.8      Identification and Characterization of Escherichia coli                      12

2.8.1   Microscopic Identification of Bacteria Isolates Gram Staining                   13

2.8.2   Catalase Test                                                                                   14

2.8.3   Oxidase Test                                                                                    14

2.8.4   Citrate Utilisation Test                                                                     15

2.8.5   Urease Test                                                                                      15

2.9      Detection of Biofilm Production                                                       16

2.9.1   Tissue Culture Plate Method (TCP)                                                  16

2.9.2   Tube Method (TM)                                                                          17

CHAPTER THREE                                                                                    18

CHAPTER FOUR: Discussion, Conclusion and Recommendations                        21

4.1      Discussion                                                                                       21

4.2      Conclusion and Recommendation                                                     22

Reference                                                                                                  23

 

 

 

LIST OF TABLES

Table Title                                                                                                                Page

3.1      Morphological and Biochemical Reaction of Bacteria Isolated

          From Ear Swab                                                                                19

3.3      Frequency and Percentage of Bacterial Isolated from Ear Swab  20

Abstract

Escherichia coli is a normal inhabitant of the intestines of most animals, including humans. The diseases caused by a particular strain of Escherichia coli depends on distribution and expression of virulence determinant such as biofilm formation. Ear phones are also a source of bacterial diseases by forming microbial biofilm in ear and may easily be a source of vector of potential pathogens. Therefore, this study investigated Escherichia coli from ear swabs of University students for in vitro biofilm production. Thirty sample of ear swabs was collected from students and a total of seventeen isolates belonging to three genus were isolated in the thirty samples. However, Escherichia coli was not isolated from all the samples collected. The bacteria were identified morphologically and Biochemically. The identified bacterial were Proteus spp., Pseudomonas aeruginosa, and Klebsiella pneumonaiae with 35.3%, 47.1% and 17.6% respectively. It was however, recommended that students should properly clean their ears and if possible, it should be everyday cleaning.

 

Keywords: Escherichia coli, Biofilm production, Students

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